<template>
        <!-- <el-button type="info" @click="logout">退出</el-button> -->
    <el-container class="home_container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/pet_shop.png" alt="comptuerIcon">
                <span>电商后台管理</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <!-- 侧边栏区域 -->
            <el-aside :width="isCollapse ? '4%' : '16%'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" :default-active="activePath" router>
        <!-- 一级菜单 -->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                     <!-- 一级菜单模板区 -->
                    <template slot="title">
                        <!-- 图标 -->
                        <i :class="iconsObj[item.id]"></i>
                        <!-- 文本 -->
                        <span>{{ item.authName }}</span>
                    </template>
                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                        <template slot="title">
                            <!-- 图标 -->
                            <i class="el-icon-menu"></i>
                            <!-- 文本 -->
                            <span>{{ subItem.authName }}</span>
                        </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
        </el-aside>
            <!-- 主体区域 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            menulist: [],
            iconsObj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'
            },
            isCollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created() {
        this.getMenuList();
        this.activePath = window.sessionStorage.getItem('activePath');
    },
    methods: {
        logout() {
            window.sessionStorage.clear();
            this.$router.push('/login');
        },
        // 获取菜单
        async getMenuList() {
            const {data: res} = await this.$http.get('menus');
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
            this.menulist = res.data;
        },
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        },
        // 保存链接激活状态
        saveNavState(activePath) {
            // 点击时先清空之前的'activePath'值
            window.sessionStorage.removeItem('activePath');
            window.sessionStorage.setItem('activePath', activePath);
            this.activePath = activePath;
        }
    },
}
</script>

<style lang="less" scoped>
.home_container {
    height: 100%;
}

.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 1.5em;
    >div {
        display: flex;
        align-items: center;
        img {
            margin-left: 2em;
            border-radius: 50%;
        }
        span {
            margin-left: 15px;
        }
    }

}

.el-aside {
    padding-left: 1em;
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
    .el-menu-item {
        padding-left: 6em;
    }
}

.el-main {
    background-color: #eaedf1;
}

.iconfont {
    margin: 0 1.5em;
}


.toggle-button {
    background-color: #4a5064;
    color: #fff;
    font-size: 10px;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>